寒区水泥固化土力学性能影响因素分析

发布时间：2018-07-02 10:29

本文选题：水泥固化土 + 水泥掺入比　；参考：《冰川冻土》2016年01期

【摘要】：为了在北方寒区推广和应用水泥固化土建造保暖性房屋和设施农业,采用内蒙古黄河灌区周边典型的粉质土,利用普通硅酸盐水泥固化土体,配制水泥固化土,采用静力机械压实法和人工分层击实法分别制作了Φ50 mm×H50 mm和Φ39.1 mm×H80 mm两种不同规格的试件,并进行了无侧限抗压强度室内试验,研究了不同水泥掺入比、不同养护龄期、不同规格及成型方法对水泥固化土无侧限抗压强度的影响,得出了不同试验条件下水泥固化土的强度变化规律.试验结果表明:强度均随水泥掺入比及龄期的增大而增大,三者之间较好地满足空间平面模型,偏回归分析表明,水泥掺入比较龄期对强度的影响贡献更大,两种规格试件的强度之间较好地满足对数关系;不同规格及成型方法的试件对水泥固化土强度的影响规律不同,Φ39.1 mm×H80 mm试件存在一个临界水泥掺入比与临界养护龄期,当超过这个值时,其强度增长率减小.
[Abstract]:In order to popularize and apply cement solidified soil to construct warm house and facility agriculture in northern cold region, the silty soil around the Yellow River irrigation area in Inner Mongolia was used, and the cement solidified soil was prepared by ordinary Portland cement. Two kinds of specimens of 桅 50 mm 脳 H 50 mm and 桅 39.1 mm 脳 H 80 mm were made by static mechanical compaction method and artificial stratified compaction method respectively, and the unconfined compressive strength was tested in laboratory. The influence of different specifications and molding methods on the unconfined compressive strength of cement-cured soil is obtained, and the variation law of strength of cement-cured soil under different test conditions is obtained. The test results show that the strength increases with the increase of cement mixing ratio and age, and the spatial plane model is satisfied between them. Partial regression analysis shows that the influence of comparative age on strength is more significant. The strength of the two kinds of specimens satisfies the logarithmic relation, the influence of the specimens of different specifications and molding methods on the strength of cement-cured soil is different, and there exists a critical cement blending ratio and critical curing age for 桅 39.1 mm 脳 H 80 mm specimens. When this value is exceeded, the strength growth rate decreases.
【作者单位】：内蒙古农业大学水利与土木建筑工程学院;
【基金】：国家自然科学基金(51069008) 教育部创新团队发展计划(IRT13069) 内蒙古自治区高等学校科学研究项目(NJZZ16057)资助
【分类号】：TU43

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